Outboard motor and vessel

Abstract

An outboard motor includes an engine, a fan, and a top cowl assembly. The fan suctions air around the engine and discharges the air through a discharge port. The top cowl assembly includes a top cowl to house the engine and the fan, and a cover to cover at least a portion of an outside of the top cowl. The top cowl assembly includes an exhaust port to communicate with the discharge port via an exhaust channel. At least a portion of the exhaust channel is defined by a surface of the top cowl and a surface of the cover.

What is claimed is: 
     
         1 . An outboard motor comprising:
 an engine;   a fan to suction air from around the engine and discharge the air through a discharge port; and   a top cowl assembly including:
 a top cowl to house the engine and the fan; 
 a cover to cover at least a portion of an outside of the top cowl; and 
 an exhaust port to communicate with the discharge port via an exhaust channel, at least a portion of the exhaust channel being defined by a surface of the top cowl and a surface of the cover. 
   
     
     
         2 . The outboard motor according to  claim 1 , wherein the exhaust port is located in a front portion of the top cowl assembly. 
     
     
         3 . The outboard motor according to  claim 1 , wherein the exhaust channel has a descending slope from the discharge port toward the exhaust port. 
     
     
         4 . The outboard motor according to  claim 1 , wherein a width of the exhaust port is larger than a height of the exhaust port. 
     
     
         5 . The outboard motor according to  claim 1 , wherein the fan includes:
 a rotor including a plurality of blades and rotatable around an axis extending in an up-down direction; and   a discharge channel structure that surrounds the rotor and defines a discharge channel extending to the discharge port; wherein   the discharge channel extends in a horizontal direction.   
     
     
         6 . The outboard motor according to  claim 1 , further comprising a louver in the exhaust port. 
     
     
         7 . The outboard motor according to  claim 6 , wherein a color of a front surface of the louver is different from colors of other areas of the louver. 
     
     
         8 . The outboard motor according to  claim 1 , wherein the exhaust port is between the top cowl and the cover. 
     
     
         9 . The outboard motor according to  claim 1 , wherein the exhaust channel does not overlap with the fan when viewed in an up-down direction. 
     
     
         10 . The outboard motor according to  claim 1 , wherein the top cowl assembly includes:
 an intake port to take in and supply air to the engine; and   an airflow inhibitor to inhibit an airflow from the exhaust channel to a space facing the intake port inside the top cowl assembly.   
     
     
         11 . The outboard motor according to  claim 1 , wherein
 the discharge port is eccentrically positioned in a right-left direction of the outboard motor; and   the exhaust port is located at a center of the outboard motor in the right-left direction.   
     
     
         12 . The outboard motor according to  claim 1 , wherein the fan is drivable by the engine. 
     
     
         13 . A vessel comprising:
 a hull; and   the outboard motor according to  claim 1  attached to a rear portion of the hull.   
     
     
         14 . An outboard motor comprising:
 an engine;   a fan to suction in air around the engine and discharge the air through a discharge port; and   a top cowl assembly including:
 a top cowl to house the engine and the fan; 
 a cover to cover at least a portion of an outside of the top cowl; and 
 an exhaust port to communicate with the discharge port via an exhaust channel and located in a foremost portion of the top cowl assembly; wherein 
   at least a portion of the exhaust port is formed by a foremost edge of the cover.